Question 1

How does the MySQL HeatWave architecture handle data distribution and access across multiple HeatWave Compute Nodes?

Options :

A : Broadcast: All nodes receive and process every query, leading to redundant work and potentially decreased performance.

B : Master-slave: One node acts as the master and receives all queries, while other nodes act as slaves and only execute the tasks assigned by the master.

C : Hash partitioning: Data is distributed and stored on specific nodes based on a hashing algorithm, ensuring efficient data access and parallel query execution.

D : Round-robin: Queries are sent to nodes in a circular fashion, potentially leading to uneven workloads and performance bottlenecks

Answer: C

Question 2

You want to set up automatic backups for your MySQL HeatWave service in OCI. Which three configuration options are essential for a robust backup strategy?

Options :

A : Retention policy for archived backups

B : Encryption options for backup files

C : Scheduling for incremental backups

D : Backup storage destination in OCI Object Storage

E : Integration with Oracle Cloud Infrastructure Notifications

Answer: A,B,D

Question 3

You are experiencing slow query performance in your MySQL HeatWave service. You notice the hs_scan_batch_size dynamic variable is set to a low value. What impact will increasing this variable likely have?

Options :

A : Reduce memory usage within the HeatWave cluster

B : Decrease the overall number of database scans

C : Increase the number of rows processed per scan, potentially improving performance

D : Require a HeatWave service restart for the change to take effect

Answer: C

Question 4

You need to update the query_cache_size configuration parameter in your MySQL HeatWave service. Which of the following methods is recommended for a production environment with minimal disruption?

Options :

A : Modify the my.cnf file and restart the HeatWave service

B : Use the ALTER SYSTEM statement directly in the HeatWave SQL shell

C : Update the parameter through the Oracle Cloud Infrastructure (OCI) Console

D : Use the SET GLOBAL statement in a MySQL client session

Answer: C

Question 5

You accidentally modified the session_cache_size dynamic variable in your MySQL HeatWave service. Which of the following immediate effects will you observe?

Options :

A : Increased HeatWave cluster resource utilization

B : Recalculations of existing materialized views

C : Automatic failover to a standby HeatWave cluster

D : Changes in query execution plans for all running queries

Answer: A

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